This is a simple hotel in Chiba 2 train/subway stops away from Tokyo Disney. Convenient and cheap if you want to go to Tokyo Disneyland or Disney Sea. It's right beside the Ichikawa-Shiohama Station in Chiba (like a 10 second walk). The JR line that stops by there goes also straight to Tokyo Station (about 25 min). There's a convenience store right beside it and they serve breakfast buffet in the morning in a small restaurant connected to it (eggs, sausages, kimchi, coffee, etc.) - nothing too elaborate, but good enough to get you started in the day.
There doesn't seem to be much to do right around the CVS Bay hotel other than hop on the train and go to Disney, Tokyo, or other places. It's also convenient to use for business travelers who might need to visit the nearby factories/businesses.
The room is tight. They don't have any extra closet space or places to store luggage, other than beside/under the dresser. So this isn't meant for those with much luggage.
Check in time is 3pm. They might let you check-in early, but it depends if your room is ready.
So this is a good place for those who 1)Travel light, 2) Want to go to Disney, 3) Want to stay outside of Tokyo proper and just ride the train in for 25-30 min. The hotel staff don't even have a map of the area they give out like other hotels. Their English is very limited, so it may not be too convenient if you don't speak Japanese and want to ask a lot of questions about the area or what to do.